AlwaysOn Availability Groups may be reported as NOT SYNCHRONIZING after you apply SQL2012 SP2 CU3 or SQL2012 SP2 CU4 or SQL2014 CU5

Dear customers, we would like to inform you of a problem that we have discovered. As we are working on a plan to fix it we want to share here what the symptoms are and what the mitigation is. When you apply SQL Server 2012 Service Pack 2 Cumulative...(read more)